JPS525806B1 - - Google Patents
Info
- Publication number
- JPS525806B1 JPS525806B1 JP44076151A JP7615169A JPS525806B1 JP S525806 B1 JPS525806 B1 JP S525806B1 JP 44076151 A JP44076151 A JP 44076151A JP 7615169 A JP7615169 A JP 7615169A JP S525806 B1 JPS525806 B1 JP S525806B1
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681762924 DE1762924B1 (en) | 1968-09-24 | 1968-09-24 | Circuit arrangement for a telephone microphone amplifier with an amplifier output side feed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS525806B1 true JPS525806B1 (en) | 1977-02-16 |
Family
ID=5697290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP44076151A Pending JPS525806B1 (en) | 1968-09-24 | 1969-09-24 |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3668320A (en) |
| JP (1) | JPS525806B1 (en) |
| AT (1) | AT298576B (en) |
| BE (1) | BE739342A (en) |
| CH (1) | CH507626A (en) |
| DE (1) | DE1762924B1 (en) |
| FR (1) | FR2018720A1 (en) |
| GB (1) | GB1269968A (en) |
| LU (1) | LU59478A1 (en) |
| NL (1) | NL6914000A (en) |
| SE (1) | SE349440B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019121937A (en) * | 2018-01-09 | 2019-07-22 | 株式会社村田製作所 | Electric charge detection circuit and piezoelectric microphone |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE351335B (en) * | 1972-01-05 | 1972-11-20 | Ericsson Telefon Ab L M | |
| DD138260B1 (en) * | 1978-08-03 | 1981-10-28 | Bernhard Gutsche | CIRCUIT ARRANGEMENT FOR INTEGRATED AMPLIFIERS OF TWO-WIRE TECHNOLOGY |
| DE2850826A1 (en) * | 1978-11-23 | 1980-06-04 | Siemens Ag | REFERENCE VOLTAGE SOURCE, IN PARTICULAR FOR AMPLIFIER CIRCUITS |
| DE2850792A1 (en) * | 1978-11-23 | 1980-06-04 | Siemens Ag | MICROPHONE AMPLIFIER, ESPECIALLY FOR TELEPHONE SYSTEMS |
| US4262261A (en) * | 1979-03-19 | 1981-04-14 | General Electric Company | Amplifier circuit |
| US5495527A (en) * | 1994-06-10 | 1996-02-27 | Ouixote Corporation | Telephone privacy device |
| KR100459565B1 (en) * | 2001-12-04 | 2004-12-03 | 삼성전자주식회사 | Device for reducing echo and noise in phone |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3316423A (en) * | 1964-07-02 | 1967-04-25 | Westinghouse Electric Corp | Amplifying apparatus providing two output states |
| US3378780A (en) * | 1964-10-07 | 1968-04-16 | Westinghouse Electric Corp | Transistor amplifier |
| US3399276A (en) * | 1965-04-28 | 1968-08-27 | Admiral Corp | Rc coupled transistor amplifier |
-
1968
- 1968-09-24 DE DE19681762924 patent/DE1762924B1/en not_active Withdrawn
-
1969
- 1969-09-11 FR FR6930946A patent/FR2018720A1/fr not_active Withdrawn
- 1969-09-11 US US856933A patent/US3668320A/en not_active Expired - Lifetime
- 1969-09-15 NL NL6914000A patent/NL6914000A/xx unknown
- 1969-09-19 SE SE12923/69A patent/SE349440B/xx unknown
- 1969-09-22 AT AT895669A patent/AT298576B/en active
- 1969-09-22 LU LU59478D patent/LU59478A1/xx unknown
- 1969-09-22 CH CH1434569A patent/CH507626A/en not_active IP Right Cessation
- 1969-09-23 GB GB46698/69A patent/GB1269968A/en not_active Expired
- 1969-09-24 BE BE739342D patent/BE739342A/xx unknown
- 1969-09-24 JP JP44076151A patent/JPS525806B1/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019121937A (en) * | 2018-01-09 | 2019-07-22 | 株式会社村田製作所 | Electric charge detection circuit and piezoelectric microphone |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2018720A1 (en) | 1970-06-26 |
| DE1762924B1 (en) | 1970-09-03 |
| CH507626A (en) | 1971-05-15 |
| AT298576B (en) | 1972-05-10 |
| GB1269968A (en) | 1972-04-12 |
| SE349440B (en) | 1972-09-25 |
| NL6914000A (en) | 1970-03-26 |
| BE739342A (en) | 1970-03-24 |
| US3668320A (en) | 1972-06-06 |
| LU59478A1 (en) | 1970-01-09 |